na-adjective, noun
extreme busyness; hecticness
A formal, literary term describing a state of being overwhelmingly busy or swamped with work. Rare in everyday speech; more common synonyms include 多忙 or 忙殺.
繁劇を極める職務に追われている。
I am swamped with duties that are extremely hectic.
その部署は常に繁劇な状態だ。
That department is always in a state of extreme busyness.